Stop control means for textile machinery



May 21, 1929. a. s. COCKER STOP CONTROL MEANS FOR TEXTILE MACHINERY Original Filed July 18, 1925 IN VEN TOR Geozye B. Hacker,

TORNE YS.

Patented May-21, 1 9 29. I

-UNITED STATES PATENT OFFICE.

STOP CONTROL MEANS FOR TEXTILE MACHINERY.

Application filed July 13, 1925, Serial No. 44,466. Renewed October 10, 1928.

, event of breakage or rupture of any one of the yarns. Of such means, two types are generally employed, one operating mechanically, and the other electrically; and

' it is with the latter type that this invention is more particularly concerned. In devices of this sort as heretofore constructed, considerable difiiculty and trouble has been experienced on account of their inability to compensate for abnormal slack in the yarns due to uneven initial winding of the spools or bobbins from which the yarn is drawn, or the accidental formation of folds or gatherings therein, so that stoppage of the apparatus was often brought about without any breaks or ruptures actually occurring in the yarns.

Amongst the objects of my invention are to overcome the difliculty noted and to correct various structural deficiencies heretofore prevalent in electric stop control devices so'as to render them immune against easy derangement, and thoroughly reliable in operation.

One way in which this desideratum may be conveniently attained will be readily apparent from the detailed description which follows of a typical embodiment of my invention, the'appended claims serving to define those featu es which I believe to be entirely new and novel, and wholly within the scope of the present improvements.

Vith reference to the drawings, Fig. I is a perspective view of a portion of a warping apparatus showing my improved stop control means in association therewith.

Fig. II is a fragmentary perspective illustration of the stop control means viewed from a different angle.

Fig. III is a staggered sectional View taken indicated by the arrows IIIIII in Fig. I. P

Fig. IV is a perspective view of the movable member of the stop control means detached from the apparatus; and

Fig. V is a fragmentary detailed sectional view taken as indicated by the arrows VV in Fig. II.

The portion of apparatus herein illustrated is ordinarily known as a creel, and will be observed as of standard construction generally in that it comprises a series of spaced parallel uprights or posts 1, 2 which are grouped in pairs, each pair supporting between them, a vertical series of spools or bobbins 3 wherefroin the'yarn is unwound in the process of warping after a well known manner. The uprights or posts 1,2 are, in the present instance, made of some dielectric material, preferably well seasoned wood; and their opposite ends are engaged in socket fittings 4: secured to opposed upper and lower headers of which only the top one is shown at 5 in Fig. I, tie rods 6 being employed to hold the frame parts rigidly in assembly, as shown. The trunnions 7 of the spools or bobbins 3 are detachably engaged in stirrup brackets 8 (see Fig. III) which are accommodated in longitudinal recesses 9, 10 respectively formed in the inner sides of the uprights 1, 2 at the rear. The usual opposed electrical conductor strips 11, 12 are in each instance attachedin spaced relation to the right angled walls of a longitudinal recession 13 formed in the outer face of the post 1 adjacent the recess 9 previously referred to; and each of said posts 1 (except the last one atthe left of Fig. I) has secured to it in a convenient manner, a co-extensive metallic rod 14; about which the yarns are passed in leaving said spools.

As is usual in electric stop systems of the type referred to, with each spool or bobbin 3 is associated a contact control means adapted, upon rupture of the yarn, to automatically establish or close the circuit between the conductor bars or strips 11, 12

and thus effect energization of the magnet or otherelectric device (not shown) relied upon to bringabout stoppage of the apparatus. As shown, the circuit closing means of my invention comprises a movable mem her or drop wire 15 (as it is ordinarily termed technically) adapted to be normally supported in suspension by the yarn passing from the corresponding spool or bobbin 3, and a fixed guide element 16 embodying yarn engaging ledges 25, 26 which cooperate with the movable member 15 in the manner hereinafter explained while said guide element 16 is secured to the post 1 by a screw 28. The movable member willbe observed as of right angled configuration, f

characterized by a comparatively short segment 17 from which extends, laterally, a longer segment 18 provided with a closed eye 19 for passage of the yarn. To obtain the advantages of combined strength and lightness in the construction of the member 15,1 employ a single: strand of wire wherein the eye19 is formed centrally by double superposed looping in a manner obvious from' Fig. IV. Beyond the eye 19 the ends of the wire strand are converged as at 20, 20 to a point of meeting, and from thence extend in-contiguous parallelism to their terminals which are bent over as at 21, 21 to embraceabearing sleeve22, see Fig. III, the sleeve 22 being held in place by reason of having its opposite ends turned over facing washers 23; As an attaching means I use a screw 24 in mounting each of the members 15 to the upright 1,

, said screw passingthrough an aperture in the conductor strip 11.v By this construc{ tionit will be seen that the member 15 is accorded free pivotal movement on the stud screw 24 to the avoidance of any binding action as sometimesoccurs with the conventional form of dropwire in which a terminal curl alone serves as a pivot bear- .ary), the bulge 11 may in each instance be made to exert just suflicient yielding spring pressure against the contiguous ends of the bearing 22 of the member 15, to predetermine. metallic contact without inducing binding, such pressurebeing easily regulatable by partial turning of the screw 24. The arrangement just described obviates the necessity for depending upon ,contactras between the shank of the screws 24 and the edge of the receiving hole in the strip 11, for

p the purpose of electric continuity, asv has generally been customary heretofore, and which, onaccount of its uncertainty, has given rise to considerable difficulty in actual practice.

In operation of the apparatus, the-members 15 will normally occupy the upright position shown in Fig; I under the constant pull of the yarn, and be free tobob or vibrate back and forth in responding to incidental fluctuations in tension. WVhen in the normal position, it is to be particularly noted that the center of gravity of the member 15 is almost directly above the pivot 2st so that but a very light and negligible drag imposed on the arm. This feature is of extreme importance and greatly reduces the power required in operating equipments of large capacity where countless yarns are warped at one time. In the event of abnormal slack due to any of the causes heretofore mentioned or to overrun'ning of the spools upon stoppage oi the apparatus, the members 15 will immediately fallu'nder'the influence of gravity, is a position such as shown in Fig. II with resulting formation in each instance by cooperation of the ledges 25 26 on the fixed element 1.6, oi": a diverted. saddle loop L by'whi'ch'the member 15 is supported and held from closing the circuit across the strips 11, 12. f Owingto the liberal range of angular movement accorded the member 15 (which will be noted as substantially ample yarn can be absorbed in the loop L to compensate fully for any of the contingencies named withoutresulting in circuit closure. Upon ruptureof the yarn, the member 15 will simply drop to the iullextent determined by engagement of its close the electric circuit and cause automatic stoppage of the apparatus in the known manner.

shown renders the operation of rethreading .very easy of' accomplishment, and also facilitates free positional adjustment of the yarn at all times to the avoidance of any restraint thereupon.

The liberal 'proportioning and rounding of the eye 19 of the member 15 as I Having thus described my invention,I

claim:

1.. The combination in electric stop con trol means for textile machinery of spaced current" conductors; a pivotally-suspended gravity-actuated stop control member in circuit with one of said conductors, said memher being formed from a slngle strand of wire to provide a yarn-eye with the terminal ends relatively-angled to embrace a bearing sleeve; and a fixed guide in close proximity thereto having spaced ledges functional to determine formation of a diverted slackcompensating saddle-loop in the yarn whereby the stopcontrol member is normally fioatingly supported and adapted to accommodate abnormal slack in individual yarns without stopping the machine.

2. A gravity control member for stop motions oftextile machinery constructedfrom a single strand of wire with a yarn eye formed centrally of the strand, the ends of the latter extended in contiguous parallelism from the eye, and the terminals of said ends curled for pivotal mountin 3. A gravity control member for stop motions of textile machinery constructed from a single strand of wire with a closed yarn eye formed by double superimposed looping centrally of the strand, the ends of 90 angle corner with" the metallic strip 12 to the latter extended in contiguous parallelism from the eye, and the terminals of said ends curled for pivotal mounting.

4:. A gravity control member for stop motions of textile machinery including a part formed from a single strand of wire looped centrally to form a yarn eye, its encs extended in contiguous parallelism beyond the eye and finished with terminal curls; and a bearing sleeve embraced by said curls.

5. A gravity control member for stop motions of textile machinery including a part formed from a single strand of Wire looped centrally to form a yarn eye, its ends extended in contiguous parallelism beyond the eye and finished with terminal curls; a

bearin sleeve embraced b said curls and facing Washers over which the ends of the sleeves are flanged.

6. In electric stop control means for textile machinery, the combination of a pivotally mounted control member, and a current conducting strip pierced to receive a pivot screw for the control member, said strip being offset at the region of the pivot to exert slight yielding pressure, regulatable by the screw, against the pivot bearing of the control member for the purpose of insuring good electrical contact.

In testimony whereof, I have hereunto signed my name at Gastonia, North Carolina, this 11th day of July, 1925.

GEORGE B. COOKER. 

